Jakob Haibel (20 July 1762 Graz – 24 March 1826 Đakovo) was an Austrian composer, operatic tenor and choirmaster.
The work was staged in a multitude of other theatres throughout the Austro-German part of Europe and no other original score by Haibel ever equalled its success.
At the time, he was not to be found in Vienna, for in 1804 he had already left for Diakowar (Đakovo), Slavonia,[1] where he spent the rest of his life as the cathedral choirmaster.
Recent research has brought to light 16 Masses by Haibel written during this time, preserved in the Kuhač collection at the Nacionalna i Sveučilišna Knjižnica in Zagreb.
Haibel became Mozart's posthumous brother-in-law when he married Sophie Weber, Constanze's sister, on 7 January 1807.